Injected new return button

src/main/java/no/ntnu/idatt1002/demo/controller/IncomeExpenseController.java

@@ -105,6 +105,9 @@ public class IncomeExpenseController extends FinanceController {
   @FXML
   private ComboBox<?> filter;
 
+  @FXML
+  private Button returnToMainMenuBtn;
+
   @FXML
   private Button returnBtn;
 
@@ -487,16 +490,16 @@ public class IncomeExpenseController extends FinanceController {
   public void switchScene(javafx.event.ActionEvent event) {
     try {
       FXMLLoader loader = new FXMLLoader();
-      if (event.getSource() == returnBtn) {
+      if (event.getSource() == returnToMainMenuBtn) {
         saveDataToFile();
         loader.setLocation(getClass().getResource("/view/MainMenuNew.fxml"));
       } else if (event.getSource() == continueBtn) {
         loader.setLocation(getClass().getResource("/view/newBudgetBudgert.fxml"));
         saveDisposableIncomeToFile();
-      } else if (event.getSource() == null) {
+      } else if (event.getSource() == returnBtn) {
+        loader.setLocation(getClass().getResource("/view/FirstMenu.fxml"));
         FileHandlingBudgetArchive.deleteBudgetDirectory(FileHandlingSelectedBudget.readSelectedBudget());
-        //removeBudgetNameFromArchive
-        FileHandlingSelectedBudget.updateSelectedBudget("");
+        FileHandlingSelectedBudget.clearSelectedBudget();
       }
       Parent root = loader.load();
       Stage stage = (Stage) ((Node) event.getSource()).getScene().getWindow();